Sunday
November 23, 2014

Posts by SARA


Total # Posts: 3,783

Analytic Geometry CHECK MY ANSWER
A neighborhood swim club charges a one-time fee of $25 to join and $85 each month. If n is the number of months of membership and t is the total amount spent, then the variables are related by the equation t = 85n 25. Which variable is the independent variable? A.t B.n C. ...
October 3, 2014

math
f(x, y) = 3y cos x, 0 ¡Ü x ¡Ü 2¦Ð what is the saddle point for this?
October 2, 2014

organic compounds
Discuss the types of trace elements in organic compounds.
October 1, 2014

slopes
thanks :)
October 1, 2014

slopes
what is the slope of the line (4,9) and (2,9)?
October 1, 2014

physics
A cannon is fired horizontally from a platform . The platform rests on a flat, icy, frictionless surface. Just after the shell is fired and while it is moving through the barrel of the gun, the shell (mass 3.2 kg) has an acceleration of 12500 m/s2. At the same time, the cannon...
September 30, 2014

Threading a machine
How do you thread a sewing machine?
September 30, 2014

Good Neighbor Day
What are some ways you can be a good neighbor?
September 30, 2014

stats and prob
Consider a sequence of independent Bernoulli trials with p= 0.2 a) what is the expected number of trials to obtain the first success? for this I thought of it as geometric so 5 trials b) after the eighth success occurs, what is the expected number of trials to obtain the ninth...
September 30, 2014

chemistry
i got 6.667. what does this mean?
September 27, 2014

chemistry
an electron in n=5 emits 4052 nm to what energy level does the electron move
September 27, 2014

physics
In a TV set, an electron beam moves with horizontal velocity of 2.5 × 107 m/s across the cathode ray tube and strikes the screen, 44 cm away. The acceleration of gravity is 9.8 m/s2 . How far does the electron beam fall while traversing this distance? Answer in units of m
September 27, 2014

chem
The electron in a ground state H atom absorbs a photon of wavelength 121.57nm, to what energy level does the electron move?
September 27, 2014

Chemistry of Life
thank you!!!!!!
September 26, 2014

Chemistry of Life
Which statement is true about water molecules? The oxygen atom has a negative charge. The hydrogen atoms do not share electrons. Water molecules move randomly around each other. Water molecules cannot dissolve many substances. Question 2. How does water relate to the ability ...
September 26, 2014

math
Which equation is equivalent to 3x + y = 5? (Points : 1) y = 5 3x y = 5 + 3x y = 3x 5 y = 3x 5
September 26, 2014

Algebra HELP PLEASE
No the choices are these: (3, 11) (2, 1) (1, 3) (5, 5)
September 26, 2014

Algebra HELP PLEASE
Which is a solution to the equation y = 2x 5?
September 26, 2014

physics
if a man moving away with the speed of 0.5 of sound from a stationary sound source producing a sound of frequency , he would hear a sound of frequency
September 25, 2014

trignometry
prove that the area of any triangle XYZ is y^2*sin(x)*sin(z)/2*sin(y)
September 25, 2014

trignometry
prove that the area of any triangle XYZ is y^2*sin(x)*sin(z)/2*sin(y)
September 25, 2014

Plz Hellp
Wanda took out a personal loan for $16,000 at 9% simple interest. How much interest will she pay after 5 years? Suppose she pays off the loan in 3 years instead of 5 years. How much money will she save in interest?
September 24, 2014

math
yes
September 24, 2014

math
number 1 is d and number2 is b
September 24, 2014

Algebra
Wanda took out a personal loan for $16,000 at 9% simple interest. How much interest will she pay after 5 years? Suppose she pays off the loan in 3 years instead of 5 years. How much money will she save in interest?
September 24, 2014

Science
smallest unit that consists of at least one atom A. Protons B. Neutrons C. Electrons D. Molecules Im thinking D but im not sure i don't remember.
September 24, 2014

MATH-Help!
A new set of car tires has a tread depth of 8 millileters. The tread depth decreases 0.12 millimeter per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven. Then predict what distance the tread depth will be 2 millimeters....
September 23, 2014

Grammar
1. Choose the answer that identifies the form of the verb in the sentence. Cindy is painting her room purple. present present participle past past participle Question 2. Choose the answer that identifies the tense of the verb in the sentence. Has the rain stopped yet? past ...
September 23, 2014

math
The wave heights h in the open sea depend on the speed v of the wind and the length of time t that the wind has been blowing at that speed. Values of the function h = f(v, t) are recorded in feet in the following table. the values that you need on the table are.. 20hr/30 knots...
September 23, 2014

math
a radio uses one-third the number of watts used by lamp, and a heater that uses 15 times as many watts as a lamp. when all are in use, the total electrical power is 1.1 kilowatts how many does the radio use?
September 23, 2014

Chemistry
How many carbon atoms are contained within 10.0 pounds of sugar, (sucrose) which has the formula c12h22o11?
September 22, 2014

Chemistry
Suppose a metal worker shapes a 3.4 mg piece of gold until it is a thin, perfectly square plate that is uniformly 8.6x10^-6 cm thick. What is the length of a side of the plate, in cm?
September 22, 2014

Empires
I need help to compare and contrast the Babylonian and Hittite empires
September 22, 2014

geography
How does chinas geography influence how people live in china?
September 22, 2014

geography
How did the geography of China affect the development of early civilization there?
September 22, 2014

Community service
Do you need to have hours to graduate high school?
September 22, 2014

Algebra( check my answers)
1. Juan deposited $200 in a savings account earning 3% interest over 2 years. What was the total amount of interest earned after 2 years? $12 $24 $120 ( my answer) $240 2. Mary borrowed $11,000 at 5% interest for 4 years. What was the total interest? $22 $220 $2200 (my answer...
September 19, 2014

algebra
how to write recursive formula and give one example of one
September 18, 2014

World History
Why did the Hittites and others migrate from central Asia to Mesopotamia? They needed more land for growing populations. They were enlarging their empire. The Persian army drove them out. Climate change brought a mini ice age to Asia.
September 17, 2014

World History
What was the significance of the Code of Hammurabi? The laws were developed from an ancient Sumerian code of laws. The laws were displayed throughout the empire for all to see. The laws guaranteed many freedoms for ordinary citizens. The laws guaranteed equality between the ...
September 17, 2014

Sixth Grade Simplest Form
Thank you Mia!
September 16, 2014

Sixth Grade Simplest Form
A. Oranges = 3/2 apples = 9/5 blueberries = 3/4 peaches = 2
September 16, 2014

Sixth Grade Simplest Form
Im having a hard time trying to solve this problem. Can someone please help me? Marcial found a recipe for fruit salad that he wanted to try to make for his birthday party. He decided to triple the recipe. 3 1/2 cups thinly sliced rhubarb 15 seedless grapes, halved 1/2 orange...
September 16, 2014

Chemistry
To drain a round swimming pool that is 18.0 ft wide and 3.75 ft deep, a worker uses a pump that can move 7.58 gallons of water per minute. how many minutes will it take to drain the swimming pool?
September 16, 2014

Chemistry
very helpful. Thank you
September 16, 2014

Chemistry
A runner's average stride length is 41 inches. She takes 28 strides in 10.0 seconds. How many minutes does it take her to run 5.0 km?
September 16, 2014

Biology
Explain the role of a hypothesis in a scientific investigation
September 16, 2014

chem
if 2.19e-9 mol of 176-W emits 1.07e15 beta particles in 1 hour. what is the decay constant? how do i go about doing this? i know the equation 0.693=kt(1/2) but i dont think that is helpful here
September 16, 2014

Biology
thanks
September 16, 2014

Biology
In terms of energy, what is the difference between glucose and ATP?
September 16, 2014

Algebra
thanks
September 15, 2014

Algebra
30?
September 15, 2014

Algebra
What is the solution to the proportion? 4/12=10/x x = 3 x = 3.3 x = 4.8 x = 30
September 15, 2014

Physics
I have tried this question over and over and not sure if the answer is 16 west or 190 south west please help. Airplane One flies due east at 250 km/h relative to the ground. At the same time, Airplane Two flies 325 km/h, 35° north of east relative to the ground. What is ...
September 14, 2014

math
write two ratios that are equivalent to 1:1
September 11, 2014

maths
what number makes statement true: 30=0.3
September 11, 2014

ENGR
1. Use the axioms of probability to show the following: (a) For any event E, P{Ec} = 1 − P{E}. (b) P{∅} = 0. (c) For any events E and F, if E ⊂ F, then P{E} ≤ P{F}. (d) If the events E1, E2, and E3 are mutually exclusive, then P{E1∪E2∪E3} = ...
September 10, 2014

calc
Consider the vector function given below. r(t) = 7t, 3 cos t, 3 sin t (a) Find the unit tangent and unit normal vectors T(t) and N(t). i found T(t) but I can't get N(t)
September 10, 2014

chem
if 14.66ml of a standard .2616M KOH solution reacts with 57.5ml of CH3COOH solution, what is the molarity of the acid solution?
September 9, 2014

statistics
let E,F and G be three events. state expressions fo rthe events. a. only F occurs b. exactly two of the events occur. c. at leasat one of the events occur. d. E and G occur but F does not. how do I go about writing these. do I use like union and intersection?
September 5, 2014

chemistry
how many mL or .0252M HNO3 are required to neutralize 25.00mL of .0148M of Sr(OH)2? and how did you get the answer!!!
September 1, 2014

Math- urgent
Vong grilled 21 burgers at a block party. He grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 pound and each hamburger weighed 1/3 pound. How many of each did Vong grill?
August 27, 2014

Math- urgent
Solving Systems by Substitution Maribel has $1.25 in her pocket. The money is in quarters and dimes. There are a total of 8 coins. How many quarters and dimes does Maribel have in her pocket? I think the equation is 10x+25x=$1.25 and x+x=8 but I'm not sure.
August 27, 2014

math
calculate the upper limit for the definite integral from -2 to 2. oh x^2+1 dx with the partition P=-2,-1,0,1,2
August 22, 2014

English
Is there any website that checks your punctuation and grammer?
August 19, 2014

math
5/x+7/y=31,7x+5y=29xy by comparision and subsitition method
August 19, 2014

Biology
thank you
August 18, 2014

Biology
I think D.
August 18, 2014

Biology
Sorry its, C. Humans have had no impact on the world's environment D. Humans have had a large impact on the world's environment
August 18, 2014

Biology
Thank You So Much! IS B. THE ANSWER TO THIS ONE? Which of the following statements are true? A.) Destruction of rain forests has no effect on living things. B.) Destruction of rain forests increases the rate of evolution of rain forest organisms. C.) Humans have had no impact ...
August 18, 2014

Biology
A "tree of life" explains: a. how organisms are related to each other b. how organisms differ from each other c. the lineages of various organisms. d. All of the above
August 18, 2014

important math question
I am also having trouble with this problem for a differentiable function it is known that f(3)=5 and f'(3)=-2 use differentials to get the approx. value of f(3.02)
August 17, 2014

important math question
how do you get that without using a calc?
August 17, 2014

important math question
the equation x^3 -x-5=0 has one solution for x between -2 and 2. what is the solution? how do I get this
August 17, 2014

Chemistry
A cow weighing 1317 slug can yield10% steak. Steak may contain 5.8 % fat. How many milligrams of fat can you get from 0.548 slug of steak? (1 slug = 14.59 kg) Answer in units of mg I started the conversion by converting slugs to kg, but I didn't know what to do after that...
August 16, 2014

Geometry
Draw a diagram. Triangles. AB n(upside down U) CD = CB
August 15, 2014

POL201
With unfunded mandates, the national government (Points : 1) respects state sovereignty. passes a national policy measure which will require state spending. approves a state policy measure and provides 1/3 of the required state spending. fully pays for the state spending ...
August 4, 2014

pol week 2 quiz
Really I thought it was a legislative veto I am going to have to do some more investigation
August 4, 2014

pol week 2 quiz
Despite the greater federal authority in the federal relationship, federalism is still important for all the following reasons except that (Points : 1) it provides the best means of developing a vast country because it allows for experimentation. it may stimulate the interest...
August 4, 2014

pol week 2 quiz
Congress controls the Executive branch by issuing (Points : 1) orders to stop what it is doing. a halt of funding for programs. a legislative veto. its authority to a different branch.
August 4, 2014

pol week 2 quiz
NOpe I have all the answers I cant seemed to fine a few of them
August 4, 2014

pol week 2 quiz
The basis for national power lies in (Points : 1) the Interstate Commerce Clause only. the Supremacy Clause and the Treaty Clause only. the Treaty Clause and the Interstate Clause only. the Interstate Commerce, Supremacy, and Treaty Clauses. Question 2. 2. In Cooperative ...
August 4, 2014

math
find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. x=2=2sqrty, x=0, y=9 about the y axis. Is this the disk or shells method and how do I set this problem up?
August 4, 2014

physics-please help
is the answer in T? I had 9.3568E-26 and it says the answer is wrong
August 4, 2014

physics-please help
A proton, traveling with a velocity of 6.8 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 8.6 × 10-14 N and direction of due south. What are the magnitude and direction of the magnetic field causing the force? If the field is up, ...
August 4, 2014

math
find teh volume of the solid by rotating y=1-x^2, y=0 around the xaxis
August 3, 2014

science
The angular velocity, after the collision, is smaller. The total angular momentum of the system is constant. The angular velocity, after the collision, is the same. The angular velocity, after the collision, is larger. The kinetic energy of the system is constant. The total ...
August 1, 2014

science
Consider a rotating platform such as you used in lab. Imagine that it is initially rotating at some angular velocity. You drop a disk, that is not rotating, onto the top of the rotating platform so that it sticks to the rotating platform and begins rotating along with the ...
August 1, 2014

POL201
A policy area in the middle of these cross-currents is elementary and secondary education – a subject traditionally under local control, with some oversight by the states. However, during the last four decades – especially since 2001 – the national government&#...
August 1, 2014

physics
A string is wrapped around a uniform disk of mass M = 1.6 kg and radius R = 0.10 m. (Recall that the moment of inertia of a uniform disk is (1/2)MR2.) Attached to the disk are four low-mass rods of radius b = 0.17 m, each with a small mass m = 0.6 kg at the end. The device is ...
July 31, 2014

sciecne
A space station has the form of a hoop of radius R = 15 m, with mass M = 6000 kg. Initially its center of mass is not moving, but it is spinning slowly with angular speed ù0 = 0.0018 radians/s.Then a small package of mass m = 5 kg is thrown by a spring-loaded gun toward...
July 30, 2014

math
thanks. so how woudl i find For which values of t is the curve concave upward?
July 28, 2014

math
Find dy/dx and d2y/dx2. x = et, y = te−t
July 28, 2014

POL 201
Well, you were correct I just got the grade back as that being correct I still did miss 2 others but I will not forget the correct answers next time. Thanks again
July 26, 2014

POL 201
Thank you so much, in my reading in my text I couldn't find anything about becoming corrupt.
July 26, 2014

POL 201
Those who attended the Constitutional Convention believed that (Points : 1) England was an evil society. America had made a great mistake in fighting the revolutionary war. British institutions of government were good but they became corrupt. America would only achieve ...
July 26, 2014

science
I thought you just do 7(20)+(5)10
July 24, 2014

science
thanks, can you help me with this one What is the angular momentum A if A = <7, 5, 0> m and = <-20, 10, 0> kg·m/s?
July 24, 2014

science
You know that a collision must be "elastic" if: The momentum of the two-object system doesn't change The sum of the final kinetic energies equals the sum of the initial kinetic energies There is no change in the internal energies of the objects (thermal energy, ...
July 24, 2014

science
A hoop of mass M = 4 kg and radius R = 0.4 m rolls without slipping down a hill, as shown in the figure. The lack of slipping means that when the center of mass of the hoop has speed v, the tangential speed of the hoop relative to the center of mass is also equal to vCM, since...
July 21, 2014

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